Dude, this guy came into the shop and I totally EF'd his wife; I like to EF the high school chicks;
by MF'n Hizaley December 07, 2004
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Noun: A reference to almost anything.

Verb: Means to fuck with (not sexually).

This can be used in replace of 'fuck' because it is toned down so as not to offend anyone.
Noun: "Hey ef, we gotta go or we'll be late!"
"Oh ef!"
Verb: :::Me playing in the ocean throwing sandcrabs at Samir::: Samir: "Don't ef with the wildlife!"

by darsebendz October 12, 2005
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The one and only, EF.

Coward, wuss, pansie, lamer, pathetic gimp.
"Look! It's EF! OMGOSH"
by Da Chip March 19, 2003
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Ef, or Effff, depending on one's level of enthusiasm, is an abreviation for "F.I." which is an abreviation for "Feeling It", typically used to describe being into an experience or a person.

One can also be Triple F.I., or simply Triple.
"How was lunch?"

"I was so ef!"

Or "Did you see that chick? She was so ef!!" "Oh shit, I missed her, she was ef?"
"Ugh, I was triple ef!!"
by ImFeelingIt July 30, 2018
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fundamentally, an electronic announcement of a boyfriend/girlfriend. phonetically, rhymes with 'bf'. usually referred to as in the context of a relationship status on a social networking site, i.e. facebook, myspace.
hey, did you hear about bree's new e-f?

yeah they've been going out for a while but she just changed her status on her facebook to in a relationship.

wow, they must be getting serious
by DanielWebz July 22, 2009
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slang for f or fail.
ef, efff, eeff
by anon76889 October 05, 2011
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